It's a simple and innovative world clock app.
Each timezones and times are shown as the order of timezone on the clock.
And, you can turn the clock by touch/mouse operation.
By turning the clock, you can easily convert time and time in the timezone A and B.

Of course, you can customize the displaying timezones and change the background picture.
I wish you enjoy this application.
Thank you!

Here is a video capture of Win8.1. WP8.1 version of this app also has same functions.